======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '184'
                                          'artist'  'King Curtis'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Memphis Soul Stew'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-JZFKS-3', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['saxophone', 'jazz', 'rhythm and blues', 'soul', 'funk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '113.389'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TBPM' (BPM (beats per minute))                     '113.389'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'Memphis Soul Stew'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'King Curtis'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['saxophone', 'jazz', 'rhythm and blues', 'soul', 'funk']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.24 dB'
'TXXX:replaygain_track_peak'                        '0.315133'

========================== row from database ==========================
                                              'id'  1214594
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Soul/King Curtis - Memphis Soul Stew.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  184
                                           'genre'  funk or soul
                                        'filesize'  5892916
                                           'mtime'  1628357769
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country funk or soul
                                      'tag_artist'  King Curtis
                                     'tag_release'  None
                                       'tag_title'  Memphis Soul Stew
                                             'bpm'  113.389
                                    'search_title'  'memphis':1 'soul':2 'stew':3
                                   'search_artist'  'curtis':2 'king':1
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'funk':5 'jazz':1 'oldies':3 'or':6 'soul':7
                                    'search_combo'  'country':9 'curtis':5B 'exotica':7 'funk':10 'jazz':6 'king':4B 'memphis':1A 'oldies':8 'or':11 'soul':2A,12 'stew':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['saxophone', 'jazz', 'rhythm and blues', 'soul', 'funk']
                                        'tag_date'  1969
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357768.9557936  (2021-08-07 19:36:08)
                             'size'  5892916